also: たまくら
noun, noun or participle which takes 'suru', intransitive verb
using one's arm as a pillow; resting one's head on one's arm
Refers to the act of using one's own arm or someone else's arm as a pillow. Often appears in poetic or romantic contexts, but also used in everyday descriptions of sleeping posture.
彼は彼女の腕を手枕にして昼寝をした。
He took a nap using her arm as a pillow.
旅先で、
While traveling, I dozed off using my own arm as a pillow.